I build products.
Some of them work.
I'm Mark — entrepreneur and technologist. Most portfolios only show the highlight reel. Below is my full ledger: every product I've shipped, ranked from best outcome to most expensive lesson.
Every product. No survivorship bias.
Ranked by outcome. The dead ones stay on the board — they paid the tuition for everything above them.
- WordUp2022acquired
Mobile app for learning English — found its audience, then a buyer.
Education is a forever market: people never stop wanting to improve.
Exit Step-racing app: your daily steps become real-time races against friends, teams, and weekly leagues.
Make a healthy habit competitive and people show up every day.
AliveAI golf coach: film your swing, get frame-by-frame analysis and fixes in seconds.
AI is most useful when it replaces something expensive — like a swing coach.
AliveReal-time leaderboard of the biggest liquidation events across Aave V3 and V4 markets — multi-network tracking, at-risk positions, and bad-debt stats.
Put a scoreboard on raw on-chain data and it becomes a destination.
AliveAI outpainting that resizes any image to any platform — extends the picture instead of cropping it.
Solve the annoying last step of someone else's workflow and they'll pay for it.
AliveAI-search visibility analytics — see how often ChatGPT and Claude recommend your brand vs. competitors.
When the channel changes (SEO → AI answers), sell the map.
Alive
- Chapa.ai2023shut down
A GPT wrapper, back when that was still a business model.
If your product is a thin layer over someone else's model, so is your moat.
Dead - BrowseBuddy2023–2024shut down
AI plugin for e-commerce stores — understands the catalog and suggests the right products to each customer.
Selling to small stores means small budgets — the AI was the easy part.
Dead - ZipVoila2021–2022shut down
Marketplace for finding real estate.
A marketplace needs buyers and sellers on day one — we had neither for long enough.
Dead - Magic Link2020shut down
Link-in-bio page to gather all your links in one place.
In a crowded category, 'slightly different' isn't a reason to switch.
Dead - Crypto Job Board2021–2022shut down
Job board connecting crypto companies with web3 talent.
A job board is a marketplace too — and it rides the hiring cycle of its niche.
Dead
career record · 1W — 5L — 5 still playing
The day job side of the ledger
What I'm doing today
Currently heads-down on StepRacers and Birdie Swing, and quietly sketching the next entry for the board. Along the way I build internal tools for myself — like OpenLLMRank — to sharpen the products I'm shipping. I'm interested in mobile apps, small sharp software, and businesses that can be run by one person and a laptop.
When I'm not working you'll find me on a golf course, a paddle court, a run, in the gym, or out surfing.
If you're building something — or buried something recently — I'd genuinely like to hear about it.